The Situation: Didymo or rock snot, is a highly invasive species of freshwater diatom that can form large and extensive mats in rivers, streams, and lakes. Didymo is native to cool temperate areas of the northern Hemisphere including Europe, North America, and Asia. In 2004, didymo was discovered infesting freshwater rivers in the South Island...

The Situation: In 2002 , a non-native insect, the redbay ambrosia beetle, Xyleborus glabratus (Coleoptera: Scolytidae), was first detected in the United States near Port Wentworth, Georgia. The beetle was likely introduced in untreated wooden packing material, such as crates and pallets, imported through the shipment of goods from its native range in southeast Asia...